Auto HVAC / Heater Control Unit Swap

BenC00

Registered User
Hopefully someone can help me :)

I am the new proud owner of a 2013 Black Edition B8.5 Saloon V6 TDI that has Alcantara electric + bolster (non memory) + seat occupied recognition s-line seats without seat heating and would like to add seat heating.

Firstly, heating elements; Does anyone know is the heating elements will be already installed into the seats and just disconnected?

Secondly, the controller; I currently have controller Auto HVAC 8K2 820 043 S (climate without heated seat control in piano black), it looks like either of the following controllers should do but could someone check and confirm for me please:

8K2 820 043 T
8K2 820 043 AQ
...or provide other suitable replacement part numbers

Providing VCDS output in case useful:
Address 08: Auto HVAC (J255) Labels: Redir Fail!
Part No SW: 8K2 820 043 S HW: 8K2 820 043 S
Component: KLIMA 3 ZONEN H04 0123
Revision: D0000000 Serial number:
Coding: 3624028080

I don't have access to ETKA but have a licensed VCDS cable :)

Thanks! :)
 
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BenC00

Registered User

BenC00

Registered User
Okay, so time to revive this thread.

As expected, i do not have the heating elements pre-installed meaning i will need to acquire some then strip the seats down. I manage this on my Mk4 golf a few years ago so i can't see it being much different.

Part Numbers:
2x 8K0963555AE (lower seat heating elements for sport seats)
2x 8K0963557R (upper seat heading elements for sport seats)
1x Wiring Harness (https://www.kufatec.co.uk/shop/en/a...ng-harness-audi-only-seat-heating?action_ms=1)
1x 8K2 820 043 AG or 8K2 820 043 AGX ZF (climatronic control panel w/ seat heating)

Some useful links:
https://audi.7zap.com/en/rdw/audi+a4+s4+avant+quattro/a4q/2013-736/8/881-881065/
http://www.audiclub.fi/audifinns/showthread.php?t=129181
https://nemigaparts.com/cat_spares/etka/audi/a4/736/819400/

Would someone be so kind to check if my Central Electronics / BCM actually supports Heated Seats?
Part No SW: 8K0 907 063 DG HW: 8K0 907 063 DG
Component: BCM1 1.0 H16 0103
Revision: 07016001 Serial number: **************
Coding: 260000108034AFE00981408000001D0D009DC30827090201000008004400070100000024000000
Shop #: WSC 06325 000 00000
VCID: 77FBD7C9C6A9F1F9E4-8022

Watch this space...
 

BenC00

Registered User
So... according to photos when searching for images of '8K0 907 063 DG' it looks like my BCM(1) doesn't have PINs available in connector G (T6f/green). Since the controller is not too difficult to gain access to, i'll take a look just in case but it doesn't look good :(

Connector G (6-pin)
Pin 1: Seat heating front left (heated driver's seat -Z6, heated driver's seat backrest -Z7); not if seat ventilation fitted)
Pin 2: Vacant
Pin 3: Terminal 30 - 3
Pin 4: Vacant
Pin 5: Vacant
Pin 6: Seat heating front right (heated front passenger seat -Z8, heated front passenger seat backrest -Z9); not if seat ventilation fitted)

Does anyone know part numbers for a 'highline' BCM? Online ETKA sites don't provide this level of info :(
It looks like 8K0 907 063 DH supports seat heating...

8K0 907 063 DG
8k%20bcm.jpg


8K0 907 063 DH
2471112.jpeg
 

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BenC00

Registered User
So, i have confirmed that the following BCM/J519/Cent. Elect. support seat heating, now i just need to confirm that they also support 8 channel PDC and Xenon's etc.

8K0 907 063 DJ
8K0 907 063 DH


Could someone with a fairly loaded B8.5 please be so kind as to share their VCDS scan showing their Auto HVAC and BCM?

I took the below from another forum, this at least confirms that HVAC 8K1 820 043 T/8K2 820 043 T pairs with BCM 8K0 907 063 DH
-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255) Labels: Redir Fail!
Part No SW: 8K1 820 043 T HW: 8K1 820 043 T
Component: KLIMA 3 ZONEN H04 0121
Revision: C1000000 Serial number: 01130220140673
Coding: 6480208000
Shop #: WSC 06335 000 00000
VCID: 393AE96CB0BF22F679-806D

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels: 8K0-907-063.clb
Part No SW: 8K0 907 063 DH HW: 8K0 907 063 DH
Component: BCM1 1.0 H16 0103
Revision: 08016001 Serial number: 00000061301701
Coding: 26000091863CAFC00000400300003D0D4F1C4708A2090221000008004000030100000030000000
Shop #: WSC 11886 002 104857
VCID: 78BC2C68CB35FBFE46-802D
 

Mucker_GT

Registered User
Sorry to revive this thread but did you ever get to the bottom of this?

I have a 2012 (Facelift 8K) A4 and have retrofitted heated seats along with the control panel and BCM from the donor car

I’ve used Odis to remove the Component Protection, and the heated seats work, however now the front parking sensors and AC doesn’t seem to work (although the aux fans/heating work as they should).

I’m now wondering if I need to replace the BCM for one that has front parking sensors, along with a control panel from the exact same age as my car (as the donor car was a 2013).

If anyone can shed some light on this, it would be greatly appreciated
 
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rum4mo

Registered User
Surely it will just be down to re-coding the new BCM to enable the front parking sensors, have you looked to see how the coding on the new BCM compares with the coding of the original one?
 

Mucker_GT

Registered User
I stupidly didn’t take any coding off the old BCM, so I think the next plan is to refit the old BCM and control panel, remove the component protection, grab all the codes off it, then fit the new BCM and control panel (+ remove component protection) then hope I can change the coding to the original and code in the heated seats.

Is this what you’d suggest or is there an easier way around it?
 

Mucker_GT

Registered User
Rum4mo...

I’ve tried to code the front sensors in but it makes no difference at all. Also for some reason the AC doesn’t work although it’s all coded in. I’m convinced now that there may be some hidden coding that’s different on both the BCM’s.
 

rum4mo

Registered User
So, OPS or at least front and rear parking sensors have already been working in your car, and now with the donor car BCM and upgraded HVAC controller fitted, the AC and some other functions do not work or can not be coded in, weird, I've no answer other than go through all the options in the coding looking for something obvious.
 

kurtisstyles

Registered User
So... according to photos when searching for images of '8K0 907 063 DG' it looks like my BCM(1) doesn't have PINs available in connector G (T6f/green). Since the controller is not too difficult to gain access to, i'll take a look just in case but it doesn't look good :(

Connector G (6-pin)
Pin 1: Seat heating front left (heated driver's seat -Z6, heated driver's seat backrest -Z7); not if seat ventilation fitted)
Pin 2: Vacant
Pin 3: Terminal 30 - 3
Pin 4: Vacant
Pin 5: Vacant
Pin 6: Seat heating front right (heated front passenger seat -Z8, heated front passenger seat backrest -Z9); not if seat ventilation fitted)

Does anyone know part numbers for a 'highline' BCM? Online ETKA sites don't provide this level of info :(
It looks like 8K0 907 063 DH supports seat heating...

8K0 907 063 DG
8k%20bcm.jpg


8K0 907 063 DH
2471112.jpeg

1001ba4070fe0bf560be9b96405e65c1.jpg

Is this the g connector has no pins does this mean I need a new bcm?
 

BenC00

Registered User
What’s the date and part number of your existing BCM?


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